Protection structure for preventing overtopping dam break of valley type flexible landfill earth and rockfill dam

Abstract

The utility model relates to the technical field of earth and rockfill dams, in particular to a protection structure for preventing overtopping and dam breaking of a valley type flexible landfill earth and rockfill dam, which comprises a dam body, a concrete pavement is arranged at the top end of the dam body, a wave wall is arranged on one side of an upstream area of the dam body, and a cushion layer is arranged on an upstream dam slope of the dam body. A face plate is laid on the outer wall of the cushion layer, an anti-scouring layer is arranged on the downstream dam slope of the dam body, the outer side of the wave wall is of an arc-shaped structure, and therefore water wave impact force can be effectively weakened, the face plate is conveniently laid on the cushion layer, the face plate is a concrete layer, the slope protection strength and the anti-scouring performance are improved, the anti-scouring layer comprises a base layer, and connecting ribs are conveniently fixed to the base layer. A plurality of concrete blocks and a plurality of connecting ribs are adhered and fixed, laying is convenient, a good anti-scouring effect is achieved, the anti-scouring edges are arranged at the bottom of the downstream dam slope of the dam body, flood flow is prevented from directly impacting a downstream foundation after flowing down from the dam slope, scouring is prevented, the resistance of the earth and rockfill dam to overtopping flood is improved, and dam break is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of earth-rock dams, in particular to a protective structure for preventing an earth-rock dam in a valley-type flexible landfill from overtopping and dam collapse. Background Art

[0002] Since the promulgation and implementation of the "Hazardous Waste Landfill Pollution Control Standard" (GB 18598-2001), my country's requirements for the landfill disposal of hazardous waste have become increasingly stringent. According to the different structures of the impermeable layer, safe landfills are divided into flexible landfills and rigid landfills. Flexible landfills mainly use artificial linings as impermeable layers, and rigid landfills mainly use reinforced concrete as impermeable barriers; according to the different topography of the site, safe landfills can be divided into valley type and flat type. The valley type mainly uses natural mountains to form storage capacity, and the flat type mainly uses excavation sites to form storage capacity. Since flexible landfills are lower in cost and have larger storage capacity than rigid landfills, most of the currently built safe landfills are valley type flexible landfills.

[0003] Based on the special site conditions of valley-type flexible landfills, a rigid interception dam needs to be built downstream of the landfill area during construction to meet landfill requirements. When constructing valley-type landfills with high slopes and steep mountains, more consideration needs to be given to the flood interception function of the dam body. The ability of traditional earth-rock dam structures to resist overtopping floods is relatively poor compared to concrete dams, and generally overtopping can cause dam collapse. Therefore, this utility model patent proposes a protective structure to prevent overtopping and dam collapse of valley-type flexible landfills during project construction, which can be applied to flood interception in flexible landfill areas with high slopes and steep mountains, meeting site construction requirements and safe landfill of hazardous waste. Utility Model Content

[0004] The utility model aims to provide a protective structure for preventing overtopping and dam-breaking of an earth-rock dam in a valley-type flexible landfill, which has the characteristics of improving the earth-rock dam's ability to resist overtopping floods and preventing dam-breaking.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective structure for preventing overtopping and dam collapse of a valley-type flexible landfill earth-rock dam, comprising a dam body, a concrete pavement is arranged on the top of the dam body, a wave-breaking wall is arranged on one side of the upstream area of ​​the dam body, a cushion layer is arranged on the upstream slope of the dam body, a panel is paved on the outer wall of the cushion layer, an anti-scour layer is arranged on the downstream slope of the dam body, the anti-scour layer comprises a base layer, a plurality of connecting ribs arranged in a staggered manner in a horizontal and vertical direction are fixedly connected to the outer wall of the base layer, and a plurality of evenly distributed concrete blocks are fixedly connected to the surfaces of the plurality of connecting ribs.

[0006] In order to pave and protect the top of the earth-rock dam and weaken the force of floods breaking the dam top, as a preferred protective structure for preventing overtopping and dam breaking of valley-type flexible landfill earth-rock dams in the utility model, the thickness of the concrete pavement is 80-100cm.

[0007] In order to weaken the impact force of water waves, as a preferred protective structure for preventing overtopping and dam collapse of a valley-type flexible landfill earth-rock dam of the utility model, the outer side of the wave-breaking wall is an arc-shaped structure.

[0008] In order to prevent the splashing of external rainwater waves in the landfill area during the rainy season, as a preferred protective structure for preventing overtopping and dam collapse of a valley-type flexible landfill earth-rock dam in the utility model, the height of the wave-breaking wall is 1-1.2m.

[0009] In order to prevent scouring, as a preferred protective structure for preventing overtopping and dam collapse of a valley-type flexible landfill earth-rock dam of the utility model, an anti-scouring ridge is provided at the bottom of the downstream dam slope of the dam body.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] A concrete pavement is set on the top of the dam body, which plays a role in paving and protecting the top of the earth-rock dam and weakening the force of floods breaking the dam top. A wave-breaking wall is set on the upstream side of the dam body to prevent the splashing of rainwater waves in the rainy season in the landfill reservoir area, and the outer side of the wave-breaking wall is an arc structure, which can effectively weaken the impact of water waves. The cushion layer is convenient for laying panels, and the panels are concrete layers to improve the strength of the slope protection and the anti-scouring performance. The anti-scouring layer includes a base layer, which is convenient for fixing connecting bars. Multiple concrete blocks are glued and fixed to multiple connecting bars, which is convenient to lay and plays a good anti-scouring role. An anti-scouring ridge is set at the bottom of the downstream dam slope of the dam body. After the flood water flows down the dam slope, it avoids directly impacting the downstream foundation to prevent scouring, thereby improving the ability of the landfill earth-rock dam to resist overtopping floods and prevent dam collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a structural diagram of the anti-scour layer of the utility model.

[0014] In the figure: 1. dam body; 2. concrete pavement; 3. wave-breaking wall; 4. cushion layer; 5. panel; 6. anti-scour layer; 7. anti-scour edge; 8. base layer; 9. connecting ribs; 10. concrete blocks. DETAILED DESCRIPTION

[0015] See also Figure 1 to Figure 2A protective structure for preventing overtopping and dam collapse of a valley-type flexible landfill earth-rock dam comprises a dam body 1, a concrete pavement 2 is arranged on the top of the dam body 1, a wave-breaking wall 3 is arranged on one side of the upstream area of ​​the dam body 1, a cushion layer 4 is arranged on the upstream slope of the dam body 1, a panel 5 is paved on the outer wall of the cushion layer 4, an anti-scour layer 6 is arranged on the downstream slope of the dam body 1, the anti-scour layer 6 comprises a base layer 8, a plurality of connecting ribs 9 arranged in a staggered manner in a horizontal and vertical direction are fixedly connected to the outer wall of the base layer 8, and a plurality of evenly distributed concrete blocks 10 are fixedly connected to the surface of the plurality of connecting ribs 9.

[0016] In this embodiment: a concrete pavement 2 is provided on the top of the dam body 1, which plays a role in paving and protecting the top of the earth-rock dam and weakening the force of the flood breaking the dam top. A wave-breaking wall 3 is provided on one side of the upstream area of ​​the dam body 1 to prevent the splashing of rainwater waves in the rainy season in the landfill reservoir area, and the outer side of the wave-breaking wall 3 is an arc structure, which can effectively weaken the impact of water waves. The cushion layer 4 is convenient for laying the panel 5, and the panel 5 is a concrete layer to improve the slope protection strength and anti-scouring performance. The anti-scouring layer 6 includes a base layer 8, which is convenient for fixing connecting ribs 9. Multiple concrete blocks 10 are glued and fixed to multiple connecting ribs 9, which is convenient to lay and plays a good anti-scouring role. An anti-scouring ridge 7 is provided at the bottom of the downstream dam slope of the dam body 1. After the flood water flows down the dam slope, it avoids directly impacting the downstream foundation to prevent scouring.

[0017] As a technical optimization solution of the present utility model, the thickness of the concrete pavement 2 is 80-100 cm.

[0018] In this embodiment, the thickness of the concrete pavement 2 is 80-100 cm, which plays a role in paving and protecting the top of the earth-rock dam and weakening the force of floods breaking through the dam top.

[0019] As a technical optimization solution of the utility model, the outer side of the wave-breaking wall 3 is an arc-shaped structure.

[0020] In this embodiment, the outer side of the wave-breaking wall 3 is an arc-shaped structure, thereby being able to effectively weaken the impact force of water waves.

[0021] As a technical optimization solution of the utility model, the height of the wave-breaking wall 3 is 1-1.2 m.

[0022] In this embodiment, the height of the wave-breaking wall 3 is 1-1.2 m, which is used to prevent wave splashing.

[0023] As a technical optimization solution of the utility model, an anti-scouring ridge 7 is provided at the bottom of the downstream dam slope of the dam body 1 .

[0024] In this embodiment: an anti-scouring edge 7 is provided at the bottom of the downstream dam slope of the dam body 1, so that the flood water can avoid directly impacting the downstream foundation after flowing down the dam slope, thereby preventing scouring.

[0025] Working principle: A concrete pavement 2 is arranged on the top of the dam body 1, which plays a role in paving and protecting the top of the earth-rock dam and weakening the force of the flood breaking the dam top. A wave-breaking wall 3 is arranged on one side of the upstream area of ​​the dam body 1 to prevent wave splashing, and the outer side of the wave-breaking wall 3 is an arc structure, which can effectively weaken the impact force of water waves. The cushion layer 4 is convenient for laying the panel 5, and the panel 5 is a concrete layer to improve the slope protection strength and anti-scouring performance. The anti-scouring layer 6 includes a base layer 8, which is convenient for fixing the connecting ribs 9. A plurality of concrete blocks 10 are glued and fixed to the plurality of connecting ribs 9, which is convenient for laying and plays a good anti-scouring role. An anti-scouring ridge 7 is arranged at the bottom of the downstream dam slope of the dam body 1. After the flood water flows down the dam slope, it avoids directly impacting the downstream foundation to prevent scouring.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective structure for preventing overtopping and dam collapse of a valley-type flexible landfill earth-rock dam, comprising a dam body (1), characterized in that: The top of the dam body (1) is provided with a concrete pavement (2), the upstream side of the dam body (1) is provided with a wave-breaking wall (3), the upstream slope of the dam body (1) is provided with a cushion layer (4), the outer wall of the cushion layer (4) is paved with a panel (5), and the downstream slope of the dam body (1) is provided with an anti-scour layer (6), the anti-scour layer (6) includes a base layer (8), the outer wall of the base layer (8) is fixedly connected to a plurality of connecting ribs (9) arranged in a horizontal and vertical staggered manner, and the surfaces of the plurality of connecting ribs (9) are fixedly connected to a plurality of evenly distributed concrete blocks (10).

2. The protective structure for preventing overtopping and dam failure of a valley-type flexible landfill earth-rock dam according to claim 1 is characterized by: The thickness of the concrete pavement (2) is 80-100 cm.

3. The protective structure for preventing overtopping and dam failure of a valley-type flexible landfill earth-rock dam according to claim 1 is characterized by: The outer side of the wave-breaking wall (3) is an arc-shaped structure.

4. The protective structure for preventing overtopping and dam failure of a valley-type flexible landfill earth-rock dam according to claim 1 is characterized by: The height of the wave-breaking wall (3) is 1-1.2 m.

5. The protective structure for preventing overtopping and dam failure of a valley-type flexible landfill earth-rock dam according to claim 1 is characterized by: An anti-scouring ridge (7) is provided at the bottom of the downstream dam slope of the dam body (1).

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